CN212058978U - Accurate liquid level detection device for high-temperature high-boron glass production - Google Patents
Accurate liquid level detection device for high-temperature high-boron glass production Download PDFInfo
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- CN212058978U CN212058978U CN202020834998.6U CN202020834998U CN212058978U CN 212058978 U CN212058978 U CN 212058978U CN 202020834998 U CN202020834998 U CN 202020834998U CN 212058978 U CN212058978 U CN 212058978U
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Abstract
The utility model discloses an accurate liquid level detection device of high temperature high boron glass production, liquid level signal conversion circuit board including liquid level detection device and passing signal transmission line connection, just liquid level detection device with a series connection potentiometre on the liquid level signal conversion circuit board signal transmission line, liquid level detection device's output termination potentiometre slip end, the potentiometre output with liquid level signal conversion circuit board is connected. The utility model discloses under the input requirement that satisfies liquid level signal conversion circuit board, the position through adjusting the potentiometre according to different liquid temperature conditions changes its resistance value, does not have signal feedback to liquid level signal conversion circuit board when realizing making liquid level detection device break away from the liquid level to the realization is liquid level detection device also can the precision measurement liquid level under the high boron environment of high temperature.
Description
Technical Field
The utility model relates to a glass production technical field, concretely relates to accurate liquid level detection device of high temperature high boron glass production.
Background
The liquid level detection device is an important ring in the production link of electronic grade glass fibers, detected data are used for controlling the feeding speed of front-end feeding equipment, and the stability of operation and the accuracy of measured values directly influence the control of the liquid level of a kiln, so that the yield and the quality of drawn wires are influenced, and the production cost and the production benefit of enterprises are greatly influenced.
The existing liquid level detection is carried out through a simple detection instrument or a liquid level sensing device, but the phenomenon that boron volatilizes to form a signal interference phenomenon when the detection instrument is irradiated to detect due to the fact that elements such as boron in high-boron glass are volatile in a high-temperature state and the volatilization amount of the elements is different under different temperature conditions is not considered, and the detection result is not accurate.
In view of the above, it is desirable to provide an accurate liquid level detection apparatus for high temperature high boron glass production, which has simple construction, intelligence and more accurate detection.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an accurate liquid level detection device of high temperature high boron glass production, include:
the liquid level detection device is connected with a liquid level signal conversion circuit board through a signal transmission line, a potentiometer is connected in series with the liquid level detection device and the signal transmission line of the liquid level signal conversion circuit board, the output end of the liquid level detection device is connected with the sliding end of the potentiometer, and the output end of the potentiometer is connected with the liquid level signal conversion circuit board;
the liquid level detection device is used for detecting the liquid level position in real time to generate a liquid level analog signal, the liquid level analog signal is converted into a voltage signal through a preset potentiometer and fed back to the liquid level signal conversion circuit board, the liquid level signal conversion circuit board converts the voltage signal into a current signal and transmits the current signal to the DCS through a signal line with a shielding layer, and the DCS converts the signal into current liquid level position information.
In the above scheme, the liquid level detection device comprises a platinum probe arranged at one end of a horizontal cross rod, the other end of the horizontal cross rod is connected with the upper end of an upright rod, and the lower end of the upright rod is connected with a moving mechanism for controlling the elevation of the upright rod; the vertical rod is provided with a high-precision displacement sensor for detecting the moving position of the platinum probe, and the sliding end of the potentiometer is connected with the signal output end of the high-precision displacement sensor through a wire.
In the above scheme, a magnetic ring is fixedly arranged on a signal transmission line connecting the liquid level detection device and the potentiometer.
In the scheme, the input resistance value of the liquid level signal conversion circuit board (2) is not less than 2000 omega.
In the scheme, the potentiometer is a differential transformer type displacement sensor, the model of the potentiometer is Kyoho spring GA-20, the resistance value conversion range is 0-5000 omega, the working power supply is DC-16V, and a voltage signal of 0-10V can be output.
In the above scheme, when the resistance value of the air between the liquid level detection device 1 and the liquid level is smaller than 2000 Ω, the resistance value of the air between the liquid level detection device 1 and the liquid level is larger than 2000 Ω by adjusting the resistance value of the potentiometer.
In the scheme, the moving mechanism controls the platinum probe to move up and down in a period of 2-3 minutes, and stops for about 3-6 seconds when the platinum probe moves down to touch the glass liquid surface.
In the above scheme, the moving mechanism comprises a motor which controls a screw rod to move up and down through a speed reducer, and the vertical rod is connected with the screw rod to drive the vertical rod to move up and down.
The utility model discloses under the input requirement that satisfies liquid level signal conversion circuit board, the position through adjusting the potentiometre according to different liquid temperature conditions changes its resistance value, does not have signal feedback to liquid level signal conversion circuit board when realizing making liquid level detection device break away from the liquid level to the realization is liquid level detection device also can the precision measurement liquid level under the high boron environment of high temperature.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the structure of the device provided by the present invention.
Description of reference numerals:
1: a liquid level detection device; 2: a liquid level signal conversion circuit board; 3: a potentiometer; 4: a magnetic ring; 11: a horizontal cross bar; 12: a platinum probe; 13: erecting a rod; 14: a moving mechanism; 15: high accuracy displacement sensor.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention is described in detail below with reference to specific embodiments and the accompanying drawings.
As shown in figure 1, the utility model provides an accurate liquid level detection device of high temperature high boron glass production, include:
the liquid level detection device 1 is connected with a liquid level signal conversion circuit board 2 through a signal transmission line, a potentiometer 3 is connected in series on the signal transmission line of the liquid level detection device 1 and the liquid level signal conversion circuit board 2, the output end of the liquid level detection device 1 is connected with the sliding end of the potentiometer 3, and the output end of the potentiometer 3 is connected with the liquid level signal conversion circuit board 2;
the liquid level detection device 1 is used for detecting the liquid level position in real time and generating a liquid level analog signal, and converts the liquid level analog signal into a voltage signal through a preset potentiometer 3 and feeds back the voltage signal to the liquid level signal conversion circuit board 2, the liquid level signal conversion circuit board 2 converts the voltage signal into a current signal and transmits the current signal to the DCS system through a signal line with a shielding layer, and the DCS system converts the signal into current liquid level position information.
Because elements such as boron in the high-boron glass liquid are volatile under the high-temperature state, and the volatilization volume under different temperature conditions is different, when the temperature is high, the air resistance is small, and the liquid level detection device 1 also has signal feedback to the liquid level signal conversion circuit board 2 when breaking away from the liquid level, resulting in signal distortion, therefore, for solving the problem, this embodiment is under the input requirement that satisfies liquid level signal conversion circuit board 2, and through adjusting the position of potentiometre 3 and changing its resistance value according to different liquid temperature conditions, realize that there is not signal feedback to liquid level signal conversion circuit board 2 when making liquid level detection device 1 break away from the liquid level to realize that liquid level detection device 1 also can the accurate measurement liquid level height under the high-boron environment of high temperature. For example, when the external temperature is 1000 ℃, the resistance value of the input signal is only 500 Ω, and the potentiometer 3 needs to be adjusted to be more than or equal to 1500 Ω, so that the total resistance value exceeds 2000 Ω, and the input requirement of the liquid level signal conversion circuit board 2 is met; when the external temperature continues to rise and reaches 1200 ℃, the signal detected by the equipment can be reduced to 300 omega, and the potentiometer 3 needs to be adjusted to be larger than or equal to 1700 omega at the moment, so that the liquid level signal can be converted into the requirement of the circuit board 2.
In this embodiment, the input resistance of the liquid level signal conversion circuit board 2 must not be less than 2000 Ω.
In this embodiment, the liquid level detection device 1 includes a platinum probe 12 disposed at one end of a horizontal cross bar 11, the other end of the horizontal cross bar 11 is connected to the upper end of an upright rod 13, and the lower end of the upright rod 13 is connected to a moving mechanism 14 for controlling the elevation thereof; a high-precision displacement sensor 15 for detecting the moving position of the platinum probe 12 is arranged on the upright rod 13, and the sliding end of the potentiometer 3 is connected with the signal output end of the high-precision displacement sensor 15 through a lead; when the device is used for detecting the liquid level, the moving mechanism 14 drives the platinum probe 12 to move downwards in a linkage mode, the platinum probe 12 stops moving downwards when touching the glass liquid level, the current glass liquid position is detected, and a liquid level analog signal generated by the liquid level position is transmitted to the liquid level signal conversion circuit board 2 through the potentiometer 3. The platinum probe mainly has the advantages that the connecting rod is contacted with the high-temperature glass liquid when moving up and down, so that a closed loop is formed, and the conduction of a system detection signal is ensured. The liquid level signal conversion circuit board receives signals output by the high-precision displacement transmitter, and only when the platinum probe probes the surface of the molten glass to form a conduction loop, the signals are output.
The moving mechanism 14 can comprise a motor which controls the screw rod to move up and down through a speed reducer, and the upright 13 is connected with the screw rod to drive the upright 13 to move up and down, so that the platinum probe 12 moves up and down.
Because elements such as boron in the high-boron glass liquid are volatile under the high-temperature state, and the volatilization amount under different temperature conditions is different, when the temperature is high, the air resistance value is small, and the platinum probe 12 also has a detection signal to be fed back to the liquid level signal conversion circuit board 2 when leaving the liquid level, so that the problem needs to be solved by arranging the potentiometer 3.
In this embodiment, since the resistance of the air between the liquid level detection device 1 and the liquid surface changes with the temperature change and does not have a linear relationship, the resistance can be directly measured through the resistance gear of the universal meter, when the resistance of the air between the liquid level detection device 1 and the liquid surface is less than 2000 Ω, the platinum probe 12 is considered to touch the wall, a fault signal is output, and the resistance of the air between the liquid level detection device 1 and the liquid surface is greater than 2000 Ω by adjusting the resistance of the potentiometer.
In the embodiment, the moving mechanism 14 is arranged to control the platinum probe 12 to move up and down in a period of 2-3 minutes, the movement stops for about 3-6 seconds when the platinum probe 12 moves down and touches the glass liquid surface, the position change of the platinum probe 12 is detected by the high-precision displacement sensor 15 during the stop period, the signal is converted into a resistance signal and transmitted to the potentiometer 3, the resistance signal is converted into a resistance signal after being processed by the potentiometer 3, and the processed signal is converted into a standard 4-20mA standard signal by the liquid level signal conversion circuit board 2 and is output.
In this embodiment, preferably, a magnetic ring 4 is fixedly disposed on a signal transmission line connecting the liquid level detection apparatus 1 and the potentiometer 3, and is used for selecting a magnetic ring with appropriate magnetic conductance and temperature characteristics for suppressing a generated high-frequency interference signal, according to a signal interference phenomenon occurring in the detection loop. In this embodiment, the signal transmission line can be used to wind the magnetic ring 4 in a penetrating manner so that the magnetic ring 4 is fixedly disposed on the signal transmission line. Can be a magnetic ring with the absorption characteristic of 25MHz resistance value. The larger the difference value of the inner diameter and the outer diameter of the absorption magnetic ring is, the larger the longitudinal height is, the larger the impedance is, the outer diameter is selected according to 30mm, the inner diameter of the magnetic ring is selected according to the outer diameter of a signal cable, and the magnetic ring mainly needs to tightly wrap the cable to avoid magnetic leakage. This is selected primarily by experience and in the case of field experiments.
In the preferred embodiment, the potentiometer 3 is a differential transformer type displacement sensor, specifically a Jinghaiquan GA-20, the resistance value conversion range is 0-5000 Ω, the working power supply is DC-16V, and a voltage signal of 0-10V can be output; the liquid level signal conversion circuit board 2 is a BYZ-2018 type circuit board, and can convert 0-10V signals into standard 4-20mA signals to be output.
Preferably, the DCS system converts and displays the signal transmitted by the liquid level signal conversion circuit board 2 into a relative position signal, for example, 96-100mm is displayed in the configuration screen.
(1) Aiming at the problems of attenuation of detection signals and ultra-low range of the detection signals caused by different boron element volatilization amounts under different temperature conditions, a 0-5000 omega high-precision potentiometer is adopted and connected in series into an input signal line, resistance values needing to be adjusted under different temperature conditions are gradually searched, and the input requirement of a measurement signal conversion circuit board is met.
(2) Aiming at the signal interference phenomenon of a detection loop, a magnetic ring with proper magnetic conductance and temperature characteristics is selected for inhibiting the generated high-frequency interference signal.
The present invention is not limited to the above-mentioned best mode, and any person should learn the structural changes made under the teaching of the present invention, all of which have the same or similar technical solution, and all fall into the protection scope of the present invention.
Claims (8)
1. The utility model provides an accurate liquid level detection device of high temperature high boron glass production which characterized in that includes:
the liquid level detection device (1) is connected with a liquid level signal conversion circuit board (2) through a signal transmission line, a potentiometer (3) is connected in series on the signal transmission line of the liquid level detection device (1) and the liquid level signal conversion circuit board (2), the output end of the liquid level detection device (1) is connected with the sliding end of the potentiometer (3), and the output end of the potentiometer (3) is connected with the liquid level signal conversion circuit board (2);
liquid level detection device (1) is used for real-time detection liquid level position to generate liquid level analog signal to convert liquid level analog signal to voltage signal through predetermined potentiometre (3) and feed back to liquid level signal conversion circuit board (2), liquid level signal conversion circuit board (2) convert voltage signal into current signal again through the signal line transmission to the DCS system of taking the shielding layer, the DCS system converts this signal into current liquid level position information.
2. The accurate liquid level detection device for high-temperature high-boron glass production according to claim 1, wherein the liquid level detection device (1) comprises a platinum probe (12) arranged at one end of a horizontal cross rod (11), the other end of the horizontal cross rod (11) is connected with the upper end of an upright rod (13), and the lower end of the upright rod (13) is connected with a moving mechanism (14) for controlling the elevation thereof; the device is characterized in that a high-precision displacement sensor (15) used for detecting the moving position of the platinum probe (12) is arranged on the vertical rod (13), and the sliding end of the potentiometer (3) is connected with the signal output end of the high-precision displacement sensor (15) through a lead.
3. The precise liquid level detection device for high-temperature high-boron glass production according to claim 1 or 2, wherein a magnetic ring (6) is fixedly arranged on a signal transmission line connecting the liquid level detection device (1) and the potentiometer (3).
4. The accurate liquid level detection device for high-temperature high-boron glass production according to claim 3, wherein the input resistance value of the liquid level signal conversion circuit board (2) is not less than 2000 Ω.
5. The apparatus for detecting the precise liquid level in the production of high-temperature high-boron glass according to claim 3, wherein the potentiometer (3) is a differential transformer type displacement sensor with the model of Kyohaiquan GA-20, the resistance value conversion range is 0-5000 Ω, the working power supply is DC-16V, and a voltage signal of 0-10V can be output.
6. The apparatus for accurately detecting the liquid level in the production of high-temperature high-boron glass according to claim 4, wherein when the resistance value of the air between the liquid level detection apparatus (1) and the liquid surface is less than 2000 Ω, the resistance value of the air between the liquid level detection apparatus (1) and the liquid surface is greater than 2000 Ω by adjusting the resistance value of the potentiometer.
7. The apparatus for detecting the precise liquid level in the production of high-temperature high-boron glass according to claim 2, wherein the moving mechanism (14) controls the platinum probe (12) to move up and down in a period of 2-3 minutes, and stops for about 3-6S when the platinum probe (12) moves down to touch the glass liquid level.
8. The accurate liquid level detection device for high-temperature high-boron glass production as claimed in claim 2, wherein the moving mechanism (14) comprises a motor for controlling a screw rod to move up and down through a speed reducer, and the vertical rod (13) is connected with the screw rod to drive the vertical rod (13) to move up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020834998.6U CN212058978U (en) | 2020-05-19 | 2020-05-19 | Accurate liquid level detection device for high-temperature high-boron glass production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020834998.6U CN212058978U (en) | 2020-05-19 | 2020-05-19 | Accurate liquid level detection device for high-temperature high-boron glass production |
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| CN212058978U true CN212058978U (en) | 2020-12-01 |
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| CN202020834998.6U Active CN212058978U (en) | 2020-05-19 | 2020-05-19 | Accurate liquid level detection device for high-temperature high-boron glass production |
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